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annotate src/core/ngx_shmtx.h @ 7682:2ab0ecfe5a5f

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release-1.19.1 tag
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 07 Jul 2020 18:56:06 +0300
parents 512c741fa841
children
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_SHMTX_H_INCLUDED_
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9 #define _NGX_SHMTX_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef struct {
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17 ngx_atomic_t lock;
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18 #if (NGX_HAVE_POSIX_SEM)
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19 ngx_atomic_t wait;
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20 #endif
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21 } ngx_shmtx_sh_t;
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23
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24 typedef struct {
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25 #if (NGX_HAVE_ATOMIC_OPS)
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26 ngx_atomic_t *lock;
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27 #if (NGX_HAVE_POSIX_SEM)
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28 ngx_atomic_t *wait;
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29 ngx_uint_t semaphore;
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30 sem_t sem;
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31 #endif
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32 #else
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33 ngx_fd_t fd;
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34 u_char *name;
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35 #endif
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36 ngx_uint_t spin;
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37 } ngx_shmtx_t;
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39
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40 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr,
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41 u_char *name);
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42 void ngx_shmtx_destroy(ngx_shmtx_t *mtx);
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43 ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
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44 void ngx_shmtx_lock(ngx_shmtx_t *mtx);
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45 void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
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46 ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid);
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49 #endif /* _NGX_SHMTX_H_INCLUDED_ */